<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
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<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 45 45">
  <defs>
    <circle id="stop-sign" cx="22.5" cy="22.5" r="20.5"/>
    <mask id="stop-symbol">
      <rect width="45" height="45" fill="#fff"/>
      <line x1="10" y1="23" x2="35" y2="23" stroke="#000" stroke-width="6"/>
    </mask>
  </defs>
  <use xlink:href="#stop-sign" mask="url(#stop-symbol)" fill="#fff"/>
</svg>